Apparatus for continuously making monolithic objects.



PATBNTED JUNE 25, 1907.

- J. M. BOYLE.

APPARATUSPOR CONTINU OUSLY MAKING MONOLITHIO OBJECTS.

APPLICATION FILED FEB. 20, 1907.

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k v 32 NN WITNESSES UN T ED STATES PATENT OFFICE.

JAMES BOYLE, OF NEW YORK, N. x, ASSIGNOR' To MONOLITHIC DUO-T COMPANY, A CORPORATION OF NEW'YOR APPARATUS FOR CONTINUOUSLY MAKING MONOLITHIC OBJECTS.

Specification of Letters Patent. g Application filed February 20,1907. Serial No. 358,425.

Patented June 25, 1907.

' bedding therein a removable core, and also if desired, bars, strips or wires of reinforcing material.

In the accompanying drawingFigure 1 is a'vertical section of a trench and mold therein and the apparatus in place, showing a portion of thecompleted conduit. Fig. 2 is a cross section on the line w x of Fig. 1, looking inthedirection of arrow A. Fig. 3 isa front'elevation of the receptacle 4 in the direction'of arrow B. Fig. 4 is a section 011 the line 11 y. of F ig. l, with the core removed, thus showing the conduit in completed statei Similar numbers of reference indicate like parts.

In the trench 1, Fig. 4, I dispose side boards 3, forming atrough shaped open mold. l

4 is a receptacle for the plastic material of which the conduit is to be formed mounted on trucks 5 for which the upper ed es of the side boards 3 serve as rails, so that y means of the cord 6 carried to any suitable stationary winding apparatus 7, said receptacle can be moved in the direction of the arrow C. The receptacle 4 has a hop er portion, the front inclined wall 9 of which extends to the bottom of the mold. At its lower edge said wall is flanged rearwardly for a short dis tance as shown at 10. The angle is preferably somewhat ,rounded, so that the flange serves to smooth thesurface on which it rests, as the receptacle is drawn forward. The rear wall 11 of the ho per is also flanged rearwardly' at 12. The ieight of the horizontal flange 12 above the bottom of the mold determines the vertical thickness of the molded conduit, and the lower face of flange 12 serves to smooth the upper surface of the plastic mass as the receptacle 4 is drawn the outside.

' ahead. The rear edgeof flange v12 is preferably curved upwardly.

Extending through the front wall 9 oft-he receptacleis a metaltube 14. The bottom portion of the rear end ofsaid' tube is cut away as shown at 15. The protrudingfront end of said tube is flared. I

16 is a distensible core of flexible material '60 preferably somewhat which passes freely through the tube 14.

One end of said core is closed by a plug or any other suitable means, as shown at 17, A

and the other end also plugged communicatesiby a hose 18 with any suitable source. of air pressure indicatedat l9. Also in the.

front wall 9 are openings 13 for thereception of wires or'flexible bars 20 of metal or other.

reinforcingmaterial to be embedded inthe completed conduit. shown in two groups respectively disposed above and below the tube 14. Their num.

her and arrangement may, however, .be va, ried as desired. v

The operationof the device is ,as follows: The end of the trench and side boards being closed, the receptacle 4is placed there, as indicated by dotted lines, Fig.1. The end of the distensible core is secured in suitable Way, as for example, by a bolt 21 extending from the end plug through the end mold board 22, and set up by a nut on The core is then distended by air from the source 19. The reinforcing bars or Wires 20 which may be secured at their ends in said end board 22 are carried through and are loosely received in the openings 13. The lengths of core and reinforcing bars in advance of the receptacle are extended on the bottom of the mold.

The plastic material to be molded is shoveled into the hopper of receptacle 4, until it rises in the mold to the upper flange 12. Then the Winding device 7 is operatedto draw the receptacle 4 ahead moving along the reinforcing bars 20 and core 16 and the introduction of'plastic material continuin Obviously, as the receptacle 4 oes forward, the plastic material is deposite in the mold to the proper depth, regulated by flange 12, and portions of the reinforcin bars 20 and core 16 in rear of said receptac e remain embedded in the mass. When the desired length of conduit has been completed, the receptacle 4 is removed from the trench and Said openings are here,

place in any I the core 16, after removal of the distending fluid, is taken out. In thisiway I am enabled to make monolithic reinforced conduits, continuously and of any length desired. The reinforcing wires or bars can, of course, be omitted.

The term reinforcing material as used herein, means any material, such as metal,

which when embedded in. the plastic mass, strengthens it. 1 p

The term plastic material means any plastic mass capable of retaining its shape by setting. I

Iclaim; g 1. In combination with a stationary open mold of trough shaped cross section, means movable along the length of said mold for depositing plastic material therein, and means for simultaneously laying a continuous flexible core in thematerial so deposited. 2. In combination with a stationary open mold of trough shaped cross section, means 1 movable alon the length of said mold for depositing p astic material continuously therein, and means for simultaneously embedding a strip of reinforcing material and a continuous core in the plastic mass 3. In combination with a stationary open mold of troughshaped cross section, means movable along the length of said mold for continuously depositing plastic material therein, means for simultaneously embed- (ling a continuous hollow core of flexible material in the plastic mass, and means for distending said core by internal fluid pressure.

4. In combination with a stationary open mold of trough shaped cross section, a hopper movable alon the length of said mold, constructedto de iver plasticmaterial into said mold and having one wall extending to the bottom of said mold: the said wall having an opening for receiving'a continuous flexible core.

5. In combination with a stationary open mold of trough shaped cross section, a hopper movable alon the length of said mold, constructed to de iver plastic material into said mold and having one wall extending to the bottom of said mold: the said wall having a central opening for receiving a continuous flexible core and a plurality of adjacent openings for receiving strips" of reinforcing material.

6. In combination with a stationary open mold of trough shaped cross section, a hopper movable along the length of said mold and constructed to deliver'plastic material into said. mold: the said hopper having one wall extending to the bottom of said mold provided with an opening for a flexible core, and the other wall having an outwardly turned flange.

7. In combination With'a stationary open mold of trough shaped cross section, a hopper 

